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Hello, this is my first post and I have very little DIY experience. I have mold growing near my ceiling AC supply vents on the insulation and surrounding wall. I removed all the insulation around the vent and used a borax solution to remove the mold off the ceiling. My question is do I even need insulation and if so what type should I use? I don't to replace the insulation and have mold return. :vs_whistle:
 

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Improper insulating and possibly leaking duct work in that area allowing warmer air to reach the cooler surfaces in the cooling months = condensation moisture. That's probably an accumulation of years of defective workmanship and been accumulating mold ever since the house was built.
 

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Is this duct for ac only, thus not in use for heat?

Bud
 
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Is the drywall falling apart from being so wet? Is the mold causing health issues or smells?. If not, I would just clean it up and let it go.
 
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